... /80cc bicycle engine kit,can put on mountain bike,beach cruiser,city bike,folding bike and so on , with EPA standard 50cc/60cc ... put on kinds of bikes such as mountain bike,beach crusuier,city bike,folding bike.the engine have different quality ,cheap ones just ... gasoline engine kit which pass EPA standard , we aslo have four stroke 50cc motor engine ,if you need ,please contact with me ...